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An electron and a positron, each with a kinetic energy of 2.50 MeV, annihilate, creating two...

An electron and a positron, each with a kinetic energy of 2.50 MeV, annihilate, creating two photons that travel away in opposite directions.What is the frequency of each photon?

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Answer #1

Here,

The kinetic energy is,

K.E= 2.50 MeV

Then,

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